Journal Of Tropical Biosciences
Volume No: 10|
Page No: 56
| FullText PDF
Title: PHENETIC RELATIONSHIPS ON THE BASIS OF LEAF, FRUIT AND SEED MORPHOLOGY OF ADANSONIA DIGITATA L. (BOMBACEAE)
1-ZHIGILA, D.A.1; 1-AJIYA, B.C1 2-OLADELE, F.A.; 2-ABDULRAHAMAN, A.A. AND 1-ABBA, H.M
1-BOTANY PROGRAMME, DEPARTMENT OF BIOLOGICAL SCIENCES,
GOMBE STATE UNIVERSITY, GOMBE, GOMBE STATE, NIGERIA
2-APPLIED PLANT ANATOMY AND WOOD TECHNOLOGY LABORATORY,
DEPARTMENT OF PLANT BIOLOGY, UNIVERSITY OF ILORIN, ILORIN, NIGERIA
Morphological features of Adansonia digitata L. were studied, for the possible delimitation of the taxon at below the species level. The wide range of uses of these naturalised trees in the world have in recent times witnessed increasing demand of their foliar, bark, root, fruit and seed products in nutritional, fibre and medical applications. The upsurge demand for these products needs to be balanced with new varieties of improved performance to meet the supply chain. To achieve this, the present study was aimed at setting the foundation of variability analysis based on morphological features to detect promising varieties for mapping out of future breeding schemes of this multi-purpose tree. Both qualitative and quantitative characters studied were coded and subjected to Cluster and Principal Component Analysis (PCA).Some morphological characters indicated close affinity amongst the Operational Taxonomic Units (OTUs) of A. digitata. Results from the PCA and Cluster analyses showed that habits, leaf architecture, fruit characters as well as the seed characters were important tools for the classification and delimitation in the species. The analyses delimited all the OTUs into four varieties hence, infra specific classification of A. digitata is hereby proposed.
In conclusion, the present analysis using morphological features of A. digitata suggests the existence of variation among the samples and may form a basis for the possibility of delimitation of the taxon and mapping out of breeding schemes for improved yield. Specifically, the OTUs 4, 5, 7, 8, 10 and 12 showed major variation among the groups. However, additional effort using other taxonomic markers like RAPD, ISSR, AFLP etc to support the present findings with a view to enhance the delimitation of the varieties of A. digitata is hereby recommended.